Photon-Assisted Seebeck Effect in a Quantum Dot Coupled to Majorana Zero Modes

He, Tian-Yu; Sun, Hailing; Zhou, Guofu

doi:10.3389/fphy.2021.687438

Cited by 5 publications

(2 citation statements)

References 44 publications

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“…Such experiments deal with nonequilibrium states which may be generated by bias voltages V or temperature differences ∆T , expressed equivalently through the corresponding thermal voltages V T , defined as eV T ≡ k B ∆T . Here Majorana features are predicted within the framework of mean currents I(V ) induced by mostly bias voltages or, to a lesser extent, mean currents I(V, V T ) induced by also temperature differences [37][38][39][40][41][42][43][44][45][46][47]. Experimental efforts on mean currents I(V ) induced by bias voltages [48][49][50] are aimed to measure the differential conductance ∂I(V )/∂V .…”

Section: Introductionmentioning

confidence: 99%

Majorana differential shot noise and its universal thermoelectric crossover

Smirnov

2023

Phys. Rev. B

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Nonequilibrium states driven by both electric bias voltages V and temperature differences ∆T (or thermal voltages eVT ≡ kB∆T ) are unique probes of various systems. Whereas average currents I(V, VT ) are traditionally measured in majority of experiments, an essential part of nonequilibrium dynamics, stored particularly in fluctuations, remains largely unexplored. Here we focus on Majorana quantum dot devices, specifically on their differential shot noise ∂S > (V, VT )/∂V , and demonstrate that in contrast to the differential electric or thermoelectric conductance, ∂I(V, VT )/∂V or ∂I(V, VT )/∂VT , it reveals a crossover from thermoelectric to pure thermal nonequilibrium behavior. It is shown that this Majorana crossover in ∂S > (V, VT )/∂V is induced by an interplay of the electric and thermal driving, occurs at an energy scale determined by the Majorana tunneling amplitude, and exhibits a number of universal characteristics which may be accessed in solely noise experiments or in combination with measurements of average currents.

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Section: Introductionmentioning

confidence: 99%

Majorana differential shot noise and its universal thermoelectric crossover

Smirnov

2023

Phys. Rev. B

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“…Details on the experimental detection of MBSs via transport characteristics measurements have been reported elsewhere [ 8 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. The photon-assisted transport properties of QD–MBS setups have been studied in the literature both theoretically [ 49 , 50 , 51 , 52 , 53 ] and experimentally [ 54 ].…”

Section: Introductionmentioning

confidence: 99%

Phonon-Assisted Tunneling through Quantum Dot Systems Connected to Majorana Bound States

et al. 2023

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We theoretically analyze phonon-assisted tunneling transport in a quantum dot side connected to a Majorana bound state in a topological superconducting nanowire. We investigate the behavior of the current through the dot, for a range of experimentally relevant parameters, in the presence of one long-wave optical phonon mode. We consider the current-gate voltage, the current-bias voltage and the current-dot–Majorana coupling characteristics under the influence of the electron–phonon coupling. In the absence of electron–phonon interaction, the Majorana bound states suppress the current when the gate voltage matches the Fermi level, but the increase in the bias voltage counteracts this effect. In the presence of electron–phonon coupling, the current behaves similarly as a function of the renormalized gate voltage. As an added feature at large bias voltages, it presents a dip or a plateau, depending on the size of the dot–Majorana coupling. Lastly, we show that the currents are most sensitive to, and depend non-trivially on the parameters of the Majorana circuit element, in the regime of low temperatures combined with low voltages. Our results provide insights into the complex physics of quantum dot devices used to probe Majorana bound states.

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Revealing universal Majorana fractionalization using differential shot noise and conductance in nonequilibrium states controlled by tunneling phases

Smirnov

2022

Phys. Rev. B

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Photon-Assisted Seebeck Effect in a Quantum Dot Coupled to Majorana Zero Modes

Cited by 5 publications

References 44 publications

Majorana differential shot noise and its universal thermoelectric crossover

Majorana differential shot noise and its universal thermoelectric crossover

Phonon-Assisted Tunneling through Quantum Dot Systems Connected to Majorana Bound States

Revealing universal Majorana fractionalization using differential shot noise and conductance in nonequilibrium states controlled by tunneling phases

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